Calculating machine



May 17, 1938. w. E. MArHl CALCULATING MACHINE original Filed Nov. 15,'1931 6 Sheets-Sheet l May 17, 1938. w. E. MA1-Hl 2,117,520

CALCULATING MACHINE Original -Filed Nov. 13, 1931 6 Sheets-Shoe?l 2 :lEE

A TTORNEY May 17, 1938. w. E. MATHI CALCULATING MACHINE Original FiledNOV. 13, 1931 6 SheeS--SheeTl 3 IN V EN TOR.

SAN

A TTORNEY W. E. MATH] May 17, 1938.

CALCULATING MACHINE 6 Sheets-Sheet 4 IN V EN TOR.

Original Filed Nov. 13, 1931 ATTORNEY Original Filed Nov. 13, 1931 W. E.MATHI CALCULATING MACHINE 6 Sheets-Sheet 5 FIE E FLE. 7-

,PPPQB I INVENTOR.

Wa/fef' f'. Maf/1l' ATTORNEY May 17, 1938. w. E. MATHI CALCULATINGMACHINE 6 sheets-sheet 6 Original Filed Nov. 13, 1931 ATTORNEY.

Patented May 17, 1938 CALCULATING MACHINE Walter E. Mathl, Oakland,Calif., assignor to Marchant Calculating Machine Company, a corporationof California Application November 13, 1931, Serial No. 574,840 RenewedDecember 28, 1935 l'lClaims.

The present invention relates to calculating machines and the likeadapted to perform the four cardinal calculations and combinationsthereof, and particularly to the type in which a transmission mechanismis adapted to be controlled by a plurality of operation controllingdevices to initiate a calculation of one or more cycles of operation.'I'he invention is concerned more particularly with means for reducingthe force or pressure required to operate any control key or lever bythe provision of power operated means for engaging or setting thevarious control devices to their respective positions.

It is an object of the invention to provide operation control deviceswhich require a comparatively light pressure for movement thereof tooperative position.

Another object of the invention is the provision of operationcontrolling mechanism which is moved to operative position by powerderived from the motor upon movement of the control devices or keys tooperative position.

Another object of the invention is the provision of power operated meansfor engaging a clutch or transmission mechanism.

Another object of the invention is the provision of power operated meansfor positioning reversing mechanism to initiate a subtractive operation.

Another object of the invention is the provision of electromagneticmeans for positioning the various operation controlling mechanisms.

Another object of the invention is the provision of means for latchingthe clutch engaging means in operative position during a plural cycleoperation. v

Another object of the invention is the provision of means for disablingthe above-mentioned latchng means at selected intervals during theplural cycle operation.

Other objects will appear as this description progresses.

The machine embodying the present invention is of the general type shownin the patent to Friden No. 1,643,710, dated September 27, 1927,

to which reference is hereby made for a disclosure of a completecalculating machine including mechanisms not specifically describedherein. It is to be understood, however, that although the invention isshown applied to a machine of the general type disclosed in said patent,it is manifest that the invention is applicable in any machine which ispower driven and in which various controlling mechanisms must be set atthe beginning of a particular operation.

The invention possesses a plurality of advan- (Cl. 23S-62) tageousfeatures, some of which will be set forth in full in the followingdescription, and while the preferred construction thereof is shown inthe drawings accompanying the description, it is understood that theinvention is capable of modifl- 5 cation within the scope of the claims.

In the accompanying drawings:

Figure 1 is a right side elevation of the machine, partly in section,showing the multiplier keys, the plus and minus keys and the clutching10 mechanism controlled thereby.

Figure 1A is a detail view showing the circuit closing means controlledby the various operation initiating devices.

Figure 2 is a partial right side elevation partly 15 in section, showingthe plus and minus keys and the means whereby the minus key controls thesetting of the reversing mechanism to initiate a subtractive operation.

Figure 3 is a left side elevation partly in section, showing theautomatic division lever and the devices settable thereby, as well asthe add key and the control exercised thereby on various lockingmechanisms in the machine.

Figure 4 is a right side elevation partly in section, showing thenumeral keys and the differential selecting mechanism associated there-With.

Figure 5 is a detail view of the locking means for the numeral keys. 30

Figure 6 is a fragmentary front elevation partly in section, showing themain actuator clutch and the power operated means for engaging saidclutch.

Figure 7 is a fragmentary plan view partly in section, showing thedriving mechanism for the main clutch, the reversible transmissionmechanism, and the power operated means for shifting said reversingmechanism to subtractive position.

Figure 8 is a right side elevation partly in section, showing theelectromagnetic means for setting the various operation control devices.

Calculating machines heretofore have been provided with power drivenmeans for controlling the various operations thereof including deviceswhich were settable by movement of various control keys against thetension of springs suillciently strong to restore the mechanism tonormal position upon completion of the operation. Calculating machinesof this type are disclosed in the application of Avery and Lerch No.405,127, filed November 6, 1929 and matured into Patent No. 2,022,103,issued November 26, 1935. In the type of machine where the operationinitiating devices positively move the various controlling mechanisms toset position against the tension of springs or such, considerablepressure sometimes amounting to several pounds is required to move saidoperation initiating devices, which is undesirable in a machine andtiring to the operator.

The present invention provides power operated means for setting thevarious controlling mechanisms to operative position upon manipulationof the respective controlling keys so that the heretofore necessarystrong springs to provide for restoration of said mechanisms areeliminated, the controlling keys being provided with very light springsso that the pressure required to 0perate the same is materially reduced.

Dz'erential mechanism The machine is provided with a plurality of banksof numeral keys, one of which is shown in Figure 4, the said numeralkeys 3|5 being mounted in a top plate 3|4 and a strap 3| 4A attachedthereto. The keys are normally held in raised position by springs 3|6bearing against the strap 3|4A and suitable shoulders formed on the keystems Disposed below and in contact with the strap 3|4A is a slide 3|'Inormally held in its forward position by a spring 3 |8. The slide isprovided with a plurality of apertures through which the key stemsextend, and each key stem is provided with a lug 3|5A which, when thekey is depressed, causes longitudinal movement of the slide 3|'|, andwhich engages under said slide to hold the key in depressed position.The clearance key 3|50 is provided on its face with a camming projectionwhich operates upon depression of the clearance key to move the sliderearwardly to release any depressed key.

'I'he selecting bar or lever which is variably depressed by thedepression of the different keys is positioned below the key stems andcomprises a duplex lever. The main lever 3|| is pivoted at its forwardend to a tongue 320 depending from the frame and is connected at itsfree or movable end with a bellcrank 308 pivoted at 309 and provided onits upper end with a rack 301 meshing with a gear of the actuatorselecting element.

Fulcrumed on a depending bracket near the end of the key section is thesecondary lever 3I2, said lever being pivoted to the main lever 3|| at3| EA (Figure 4). The arrangement of the duplex lever system is suchthat the selecting element is variably positioned from one to nineincrements upon depression of the corresponding numeral key 3|5. Thebellcrank 308 is shown in Figure 4 in its zero position, in which thelug 308B engages a zero stop 308C under the tension of spring 3I0.Reference is hereby made to the above noted patent to Friden andapplication of Avery and Lerch for a more detailed description of thedifferential selecting mechanism. The values entered into the actuator300 are transferred to the numeral wheels (Figure 1) upon rotation ofsaid actuator by means to be described hereinafter.

Means are provided for locking the settable selecting element 305 in setposit-ion upon rotation of the actuator 300. Said means comprises alocking dog 84D (Figure 4) pivoted at 84| and adapted to be rocked intoengagement with a notched flange of selecting element 305 by a cam 843integral with the actuator, moving an arm 842 in a counter-clockwisedirection to rock said dog into engagement with the flange.

Driving mechanism The machine is provided with a motor which drivesthrough suitable speed reducing gearing the drive shaft |00 of themachine (Figures 3 and '7). Mounted on said drive shaft is a ratchetwheel (Figure 3) which constitutes the driving member of the clutch ||0.Secured within the clutch housing ||2 is a pawl ||3 which is constantlyurged into engagement with the ratchet Wheel III by a compression springH4, being held normally from engagement therewith by the nose II'I ofthe clutch bellcrank lever II5. As fully disclosed in theabove-mentioned patent, upon counter-clockwise movement of saidbellcrank, the pawl I|3 engages with ratchet wheel I I to drive theactuator 300 through one or more cycles of movement, depending upon therelease of bellcrank lever I i5 so that the nose I I'I thereof engagesthe tail of pawl ||3 and disengages the same from the ratchet wheel I II. The means for rocking the bellcrank ||5 will be describedhereinafter.

Suitable reversing gearing is interposed between the clutch ||0 and theactuator 300 (Figures 1 and 7). Such reversing gearing is fullydescribed in the above-mentioned patent, and it will only be necessaryto mention such parts as cooperate with the instant invention. Gears I3|and |33 (Figures 6 and '7) serve to transmit rotation from the clutchhousing to the actuator, depending upon the desired direction ofrotation. The gear I3| drives through a train of gearing to drive saidactuator in an additive direction, while the gear |33 drives through atrain of gearing serving to drive said actuator in a subtractivedirection. The drive from the clutch housing to the respective gear istransmitted by the pin |34 (Figure 7) splined to said shaft and beingshiftable into a seat in either of the respective gears |3I and |33. Asuitable shifting fork |43 is provided for shifting said pin from theseat in one gear to the seat in the other, said pin being normallydisposed within the seat in the gear |3| in the position to drive saidactuator in an additive direction.

Power operated clutch engaging means The plus key 200 is mounted forvertical sliding movement by means of slots therein engaging a pair ofstuds 20|, said key being normally maintained in its elevated positionby a spring 202 tensioned between the upper stud 20| and a pin 203 onsaid key stem. Said pin 203 overlies a bar |50 (Figure l) which ismounted on parallel links 15| so that depression of key 200 through thepin 203 results in a downward and rearward movement of the bar 150.Secured to a depending ear of said bar is a roller 150A which isdisposed in front of a link |50, and secured to the lower end of link|50 is a rearwardly extending link |5I. Rearward movement of link |5|serves to close the circuit to the motor and cause engagement of saidclutch, as is hereinafter described.

The minus key 220 is mounted for vertical sliding movement on studs 22|,being normally held in raised position by leaf spring 222 bearingbeneath a pin 223 secured to said key. Pin 223 also overlies thehorizontal arm of a bellcrank 225 which is adapted to be rocked in acounterclockwise direction on depression of the key 220. Secured to thehorizontal arm of said bellcrank 225 is a pin 224 which overlies theparallel link '|50 and is adapted to depress the same during the latterpart of the downward movement of the minus key 220. the purpose of suchdelayed action being explained hereinafter in connection with thecontrol of the reversing mechanism.

A series of multiplier keys of differing numerical values are provided,said keys being mounted for vertical sliding movement on pins 134, beingnormally maintained iny their raised position by spring 133 tensionedbetween the upper pin 134 and a lateral extension on the lower end ofthe key stem. The lower end of the key stom is provided with a nose 13IA which is adapted, on depression of the key, to cam a latching slide135 to the right, and thereafter to be positioned beneath a nose 135A onsaid slide to maintain said key in depressed 'position during theoperation determined thereby. The mechanism controlled by said keyswhereby the clutch is maintained in engagement for a plurality of cyclesoi' operation, is fully disclosed in the abovementioned patent. Securedto the key stem 13| ls a pin 130 overlying the parallel bar 150 andbeing adapted to depress the same upon depression of the multiplierkeys. Depression of the multiplier key through the pin 138 depresses theparallel bar 150, causing the roller A to rock the links 15| rearwardlyto cause engagement of the clutch.

Means are provided for operating the clutch engaging mechanism uponmovement of the division lever to operative position. The division lever600 (Figure 3) is pivoted at 60| and is connected at the bottom endthereof by a pin 602A with a division slide 602, said divisori slidebeing normally held in its forward position by a spring 604 tensionedbetween said slide and a suitable stud on the base plate. At itsrearward end, the

slide 602 is provided with a laterally extending pin 602B which isdisposed in front of an upwardly extending ear |5|A of slide |5I. Whenthe division lever 600 is moved toward the front of the machine, thelower end and slide 602 are moved rearwardly, pin 602B serving to causerearward movement of link |5| to cause engagement of the clutch.

Means are provided for enabling the clutch engaging means upon rearwardmovement of the link |5|. Secured to the link |5| at |5|B near therearward end thereof is a depending arm of a cam disk |20 (Figures 1 and6) on shaft H6.

The cam disk |20 is normally maintainedin the position shown in Figure 1by a spring |20A tensioned between the depending arm thereof and asuitable stud on the machine base. The disk |20 is provided with a pairof opposltely disposed cam slots which are adapted when said disk is inoperative position, to receive the lateral cam lugs HSA of a lever H9loosely mounted on the shaft H6. A compression spring HSC (Figure 6)tends to move said lever H9 to the right on the shaft H5 as viewed inFigure 6. Movement of said lever H9 to the right positions a roller HSBcarried on the upper end thereof in the path of a cam |2| secured to themain drive shaft |00 (Figures 1 and 6).

Means are provided for closing the circuit through the motor uponrearward movement of the link |5I. The link |5| is provided with a depending lug |5|C of insulating material, which, in the forward positionof said slide, serves to separate the pair of spring contacts 300(Figures 1 and 1A). Upon rearward movement of the slide |5|, theinterponent |5IC is moved from between said contacts, which thereuponclose a circuit through the motor which rotates shaft |00 and cam |2I.The rearward movement of slide I5| has also rocked the cam disk |20 topermit the cam lug IIIA to move in alignment with the slot formedtherein, permitting the spring HIC to move the lever H9 to position theroller HIB.

in the path of the cam I2|. During the subsequent rotation of the cam I2|, the lever H0 is rocked in a clockwise direction, rocking the clutchrelease bell crank H5 by contacting a laterally extending pin ||5Asecured thereto. Thus rearward movement of link I5| serves to enable themechanism to cause engagement of the clutch` H0 by rocking the clutchrelease bell crank H5 from engagement with the clutch housing againstthe tension of the spring i IB.

Means are provided for latching the clutch release bell crank in clutchengaging position. An arm |5|D is pivoted to link l5| at |5|B andsecured to the rearward end thereof is a twopart lever |52 (Figure 1)whichis pivoted at I 52A. The nose |52B of said lever is maintained inlongitudinal alignment with the lower part by means of the spring |52Cwhich holds a laterally extending lug on said nose in contact with saidlower part. Upon rearward movement of the slide |5l, the lever |52 isrocked in a counterclockwise direction as viewed in Fig. 1, so that thepin H5A is positioned in the notch in nose |52B upon clockwise movementof the bellcrank lever H5, and said bellcrank is latched thereby inclutch engaging position. rI'hus as long as an operation control key isin operative position the clutch release bellcrank H5A is latched out ofengagement with the clutch housing, pemxitting the clutch to remainengaged until release of the depressed key.

Means are provided for disabling the latch for the clutch controllingmember during plural order operations in which it is desired to stop theactuating mechanism without restoring the controlling device therefor tonormal position. This is disclosed in the instant case in connectionwith the automatic division lever, but is equally applicable tomechanism which includes means for setting up a plural order multiplierwhere such latch is disabled during a shifting operation.

As fully described in the above mentioned patent and application, uponmovement of the next to highest order numeral wheel 40| from zero tonine, or nine to zero, cam lug 426 (Figures 1 and 4) rocks the transferlever |25, which through lateral extension 630A rocks a lever 630 whichis connected by -a link 63| with an upwardly extending arm 632 securedto shaft 633. To the other end of shaft 633 (Figure 3) is secured alever 63! having a pin 634A disposed within a slot in an upwardlyextending arm 635. The arm 635 is provided with a lateral lug 635A whichhas an aperture to receive a rod 636. The rearward end of said rod isconnected to the tail of the latching pawl |52. The rod 636 is allowed acertain amount of lost motion to allow a rocking of pawl |52B withoutmoving the lever 635.

Counterclockwise rocking of lever 635 (Figure 1) is sumcient to pull therod 636 and rock the latching pawl |528 in a clockwise direction againstthe bias of spring |52C to disengage the latch from the bellcrank H5,allowing the same to engage the clutch housing. and disengage the clutchat the end of the cycle of operation then in progress in a well knownmanner.

'I'hus the latch for the clutch controlling bellcrank H5 is dis iwhenever an overdraft occurs during a di on operation, whether it be apositive or a negative overdraft, so that the bellcrank is allowed toengage the clutch housing and lli fili

stop the operation of the machine. I'he latch |52B is maintained inoperative position by spring |52C, however, so that upon subsequentrocking of the bellcrank I I to again engage the clutch, it is againlatched in its locked position to permit succeeding cycles of rotationof said clutch to complete the operation,

Means are provided for latching the selecting mechanism in set positionand for locking the keyboard upon movement of the clutch bellcrank H5 toclutch engaging position. As previously described, the locking dogs 840(Figure 4) are secured to a shaft 84|. One of said dogs is provided withan extension to the end of which is secured a link 844, the other end ofsaid link being secured to an ear on gate 845 pivoted at 846, so that arocking of the gate 845 to the rear of the machine will cause acounter-clockwise oscillation of the dog 840 to engage the selectingelement 305 and lock the same in adjusted position. The gate845 (Figure3) is provided with a downwardly extending arm 841 to which is secured aroller 848, Adapted to engage the roller 848 is the notched rearward endof a link 849 which is pivotally secured at its forward end to a pivotedsupporting member 850 at 850A. The member 850 is connected to the clutchrelease bellcrank ||5 by a link 85| (Figures 1 and 3) so thatcounter-clockwise oscillation ofthe bellcrank H5 (Figure 3), to causeengagement of the clutch, causes a rearward oscillation of the member850 and rearward movement of the link 849, so that if the notch on theforward end of said link is in engagement with the roller 848, the arm841, and gate 845 will be rocked to move the locking dogs 840 to lockingposition, as above described.

Means are provided for enabling the lock engaging function of gate 845only during plural cycle operations. The link 849 is providedintermediate its end With a slot 849A (Figure 3) in which engages thepin 252A on a lever 252 pivoted at 253. The forward end ofsaid lever 252is secured to the add key 250 at 25|, as shown in Figure 3. Upondepression of the add key 250, the notch 255 therein engages in thecover plate under the influence of spring 256, rocking the lever 252 andraising the rearward end of link 849 out of engagement with the pin 848,so that rearward movement of the link 849 is ineffective. The locking ofthe selecting elements is controlled in the usual manner during a singlerotation by the cam 843 and a finger 842 cooperating therewith (Figure4). Duringplural cycle operations the clutch release bellcrank ||5 ismaintained rocked in counter-clockwise direction, maintaining the link849 in its rearward position in which it engages roller 848, and holdingthe locking dog 840 in engagement with the selecting element 305continuously during the entire operation.

Means are provided for locking the keyboard upon movement of the clutchrelease bellcrank to clutch engaging position. As previously described,counter-clockwise movement of bellcrank H5 (Figure 3) through link 85|,rocks the supporting member 850 towards the rear of the machine. Pivotedto the upper forward edge of member 850 is a spring link 860, theforward end of which is provided with a notch engaging pin 25| on theadd key 250. A second notch 86| is provided in the forward end of saidspring link 860 which engages a pin 862 on lock bar 863 (Figures 3 and5). This lock bar is rockably supported adjacent the key latching slide3|1 in notches 864 and depending supporting ears 320,

in which notches it is retained by springs 865 and 886 secured theretoand to the frame. Lugs 881 (Figure 5) embrace one of the ears 320 toprevent lateral movement of the lock bar. Rocking of the supportingmember 850 exerts a pull on link 860, rocking the lock bar 863 to bringits forward end directly behind the struck down lug 868 on the latchingslide 3|1 (Figures 3 and 4), thus preventing the rearward movement ofthese slides necessary to permit depression or release of any numeralkey.

The keyboard lock, as well as the selection lock, is disabled duringaddition to permit faster operation in setting up items on the keyboard.'I'he forward end of link 860 having a slot engaging stud 25| on the addkey 250, is lowered upon depression of the add key, so that notch 86|does not engage the pin 852 and rearward movement of the link 860 has noeiect upon the lock bar 883.

Power setting of the reversing means, and cofntrol therefor Means areprovided for enabling power operated means for setting the reversinggears to subtractive position upon depression of the minus key 220. Aspreviously described, depression of key 220 through pin 223 rocks thebellcrank 225, said bellcrank being maintained in its normal position asshown in Figure 2 by spring 226. Secured to the lower end of the arm ofbellcrank 225 is a link 221 (Figures 1 and 2), said link being supportedat its rearward end by an arm 221A (Figure 2). Ihe link 221 is providedwith a downwardly extending lug 221B of insulating material which isnormally disposed between the two spring contacts 80| (Figures 1A and2). Upon rearward movement of the link 221, the interponent 221B isremoved from between the contacts 80| which thereby energize the motorand start the rotation of shaft |00.

The link 221 is provided with a cam lug 221C (Figures 2 and '7) whichnormally holds the downwardly extending arm of lever 228 to the left, asviewed in Figure '7. The upper arm of said lever 228 contacts theforwardly extending arm 229 of a two part member 229, 229A, holding thesame rocked in a counter-clockwise position, as shown in Figure '7,against the compression spring 230. Two part member 229, 229A is carriedon shaft 235, being splined on said shaft so that movement of one partof member 229, 229A is effective to rock the other part. The rearwardand upwardly extending arm 229A is provided with a cam (Figures 2 and'7) which is adapted to engage in a slot of shaft |44 and shift the sameto shift fork |43 (Figure '7) and thereby position the reversing pin|34. Lever 229, 229A is normally held in the position to performadditive rotation of the actuator by spring 23|, as shown in Figure 2.

As shown in Figure '7, member 229, 229A is held in its normalinoperative position with the link 221 in its forward position. Uponrearward movement of link 221, compression spring 230 becomes effectiveto rock the lever 229 in a clockwise direction to position a roller 229Bon an upward extension of said lever in the path of a cam 232 (Figure 2)on the driving shaft |00. As the motor has been energized and isrotating the shaft |00 and cam 232 are rotating in a clockwisedirection. Cam 232 contacts roller 229B, rocking lever 229, 229A in acounter-clockwise direction, whereby the cam flange formed thereonbecomes effective to shift shaft |44, fork |43, and cam |34 annoso totheir right hand positions, as viewed in Figure 7, thereby determining asubtractive drive of the actuating mechanism.

The setting of the reversing pin |34 is accomplished before the releaseof the clutch by bellcrank ||5, due to the lost motion between pin 224and link 150, as shown in Figure l. Thus the reversing gearing is fullypositioned before the clutch is engaged to start actuation.

Means are provided for setting the reversing gearing to subtractiveposition upon movement oi' the division lever to operative position. Aspreviously described, movement of the division lever 300 to operativeposition causes rearward movement of a slide 302 and a pin 302B securedthereto. The pin 302B is disposed immediately in front of an upwardextension 221D on link 221 (Figures 2 and 3). Rearward movement of slide302 is thereby imparted through link 221 to enable the means for settingthe reversing gears to subtractive position in the manner describedabove.

It is to be noted that upon movement of the division lever to operativeposition, the reversing gears are set before the clutch is engaged foractuation. This is due to the relative spacing of lugs 221D and |5|Awith respect to the pin 302B as shown in Figure 3. The lug 221D is incontact therewith and the lug |5|A is spaced to the rear thereof, sothat rearward movement of slide 302 causes rst a positioning of thereversing gear to subtractive position, and thereafter an engagement ofthe clutch.

Means are provided for latching the reversing mechanism in subtractiveposition upon movement of the same thereto, until the end of thesubtracting operation and the disengagement of the clutch. 'I'he slide221 engages a lateral extension 233A on a spring pressed plunger 233(Figure 2), normally holding the 'same in depressed position. Uponrearward movement of link 221, a notch 221E permits the plunger 233 tomove upwardly under the influence of compression spring 234, the nose ofsaid plunger impinging against a cam 223C formed on member 229A. Whenmember 229 is rocked in counterclockwise direction by cam 232, the camsurface 223C moves from over the plunger 233, allowing the same to moveupwardly under the influence of spring 234 to a position in front of theforward edge of said cam, thereby holding member 229, shaft |44 and pin|34 in the position to cause subtractive rotation. When the operationcontrol device is released, that is, either the minus key or thedivision lever, the slide or link 221 moves forwardly under theinfluence of spring 223, and again .depresses the plunger 233 permittingmember 229 to be restored to its normal position, as shown in Figure 2,by the spring 23|.

In the modification shown in Figure 8, means are disclosed whereby theclutch is engaged upon depression of the plus or minus keys ormultiplier keys by electro-magnetic means. Upon depression of the minuskey, the reversing gears are also set by said means.

The plus key 200 is provided on its stern with a cam lug 200A which isadapted to contact with a pin 203A to cam a slide 203x rearwardlyagainst the tension of a spring 205. 'I'he pin 203A lies immediately infront of a pair of contacts 303 mounted in a block of suitableinsulating material which is mounted for rocking movement on shaft 304.Rearward movement of said pin closes aid contacts, pin 203A engaging oneof said pair of contacts while the other contact is pressed against pin233C, thereby making a circuit through the solenoid 345. 'I'he righthand end of the core 303 of said solenoid is made of non-magneticmaterial, the relative positioning of the magnetic material with respectto the solenoid being such that upon energization of the solenoid thecore 303 will be moved to the right from the position shown in Figure 8.Said core 306 lies immediately in front of and in contact with a lateralextension of a pivoted member |20 Pivoted to the upper end of member |20is a link |2| X which extends rearwardly and by a notch in the rearwardend thereof engages a pin ||5 on the clutch release bellcrank H5.Consequently, upon energization of the solenoid the rearward movement ofits core 306, lever |20X, and link lillX serve to rock the clutchrelease bellcrank to clutch engaging position.

The minus key 220 is provided on the stem thereofwith a cam lug 220Awhich is adapted, upon depression of the minus key, to contact a pin203B on slide 203x, moving said slide to the right and closing thecontacts 303, whereupon the clutch is engaged in the manner describedabove. It will be noted that the cam lug 220A is slightly spaced fromthe pin 203B so that the minus key may move downwardly appreciablybefore contacting the pin 203B and closing the contacts 303. The purposeof said spacing is to permit positioning of the means for setting thereversing gearing before rearward movement of link |2| Means areprovided whereby the reversing mechanism is set to subtractive positionupon depression of the minus key. The stem of the minus key 220 isprovided with a lateral extension 220B which overlies a pin 224A onmember 224 pivoted on link |2| Member 224 is slotted to engage a pin|2|A on said link |2| and is normally held with the bottom edge of saidslot engaging said pin by a spring 225x, thus maintaining the pin 224Aimmediately beneath extension 220B. Upon depression of the minus key,member 224x is rocked downwardly, positioning the rearward edge thereofin front of a pin 226A on a depending link 223 Secured to the bottom ofsaid link 226 is a rearwardly extending link 221 which is pivoted at itsrearward end to the reversing member 229A. When member 224X ispositioned in front of pin 226A and the solenoid 305 is energized,rearward movement of the core 306 of said solenoid imparts rearwardmovement to link |2| link 221, rocking member 229 in a counterclockwisedirection, the cam extension 229A thereof becoming effective to shiftshaft |44, part |43 and 'reversing pin |34 to subtractive position. Link221 and member 229 are normally held in position to determine additiveregistration by spring 221A tensioned to the forward end of link 221.Link |2|X is permitted a sufficient amount of lost motion with respectto clutch release bellcrank ||5 so that the reversing pin is fullypositioned before engagement of the clutch.

Means are provided whereby the clutch will be engaged by theelectro-magnetic means upon depression of a multiplier key. Aspreviously described, upon depression of a multiplier key 130 the nose13| A formed on the bottom of the stem thereof to contact the lug 135'Aon slide 135 moves said slide rearwardly. The slide 135 is provided witha pin 135B which is disposed immediately forward of a downward extension300A from the spring Contact assembly 303. Rearward movement of slide135 acts to close said contacts 303, 'pin 135B engaging extension 300Aand rocking spring contact assembly 803 about shaft 804 so that one ofthe contact arms is pressed against pin 203A and is thereby exed intocontact with the other arm thereby energizing the solenoid 805, causingrearward movement of its core 806 member |20, link I2I rocking the,clutch release bellcrank II5 to clutch engaging position.

I claim:

1. In a calculating machine having a motor, actuating mechanism, aclutch between said motor and said actuating mechanism, power operatedmeans for causing engagement of said clutch, normally disabled means forlatching said means in clutch engaging position, motor operation controlmeans, and manually operable means for enabling said engaging means,said latching means and said motor control means.

2. In a calculating machine having a motor, actuating mechanism, aclutch between said motor and said actuating mechanism, power operatedmeans for causing engagement of said clutch, normally disabled means forlatching said means in clutch engaging position, manually settable meansfor controlling said engaging means and initiating operation of themachine including operation of said motor, means for latching saidengaging means in operative position, and automatically operated meansfor disabling said latching means upon completion of an ordinalregistration during plural order operations.

3. In a calculating machine having a motor, actuating mechanism, aclutch between said motor and said actuating mechanism, power operatedmeans for causing engagement of said clutch, normally disabled means forlatching said,` means in clutch engaging position, manually settablemeans for controlling said engaging means and initiating operation ofthe machine, means for latching said engaging means in operativeposition, and means controlled by an overdraft registration fordisabling said latching means with said settable means in operativeposition.

4. In a calculating machine having a motor, actuating mechanism,transmission mechanism including a clutch and reversing means, motoroperated means for causing engagement of said clutch and positioningsaid reversing means, and manually operable means for determiningoperation of said motor operated means.

5. In a calculating machine having a motor, actuating mechanism,transmission mechanism including a clutch and reversing means, motoroperated means for causing engagement of said clutch and positioningsaid reversing means, a switch for controlling operation of said motor,and manually operable means for determining operation of said motoroperated means including means for closing said switch.

6. In a calculating machine having a motor, an actuator, a reversibletransmission mechanism between said motor and said actuator, normallydisabled power operated means for reversing the setting of saidmechanism, a normally disabled latch for maintaining said mechanism inadjusted position, and manually operable means for enabling said poweroperated means and the latch therefor.

7. In a calculating machine having a motor, an actuator, a reversibletransmission mechanism between said motor and said actuator including aclutch and reversing means, power operated means for setting saidreversing means and causing engagement of said clutch, and manuallyoperable means for enabling said power operated means seriatim.

8. In a motor driven calculating machine, a cyclically operableactuator, a train of driving mechanism therefor including a portionoperable in time with said actuator and a separable portion operablesynchronously with said motor, a. clutch for connecting said portions,means for causing engagement of said clutch, normally disabled meanscomprising an element of said separable portion of said drivingmechanism for operating said clutch engaging means, and a manuallyoperable member for concurrently enabling said last named means andinitiating operation of said motor.

9. In a motor driven calculating machine, a cyclically operableactuator, a train of driving mechanism therefor including a portionoperable in time with said actuator and a separable portion operablesynchronously with said motor, reversing means interposed in the timedportion of said train, means for positioning said reversing means, andmeans comprising an element ol the separable portion of said train foroperating said positioning means.

10. In a motor driven calculating machine, an actuator, a clutch elementoperable in timed relation therewith, an untimed clutch element drivenby said motor, circuit closing means for said motor, means for causingengagement of said elements comprising a shiftable member operable bysaid untimed element, said shiftable member being permanently incooperation with said engaging means, and a common member for shiftingsaid shiftable member into the plane of said untimed element andoperating said circuit closing means.

trolling starting operation of said motor, and

manually operable means for initiating operation of said motor controlmeans to start said motor and to initiate operation of said motoroperated means.

12. In a calculating machine having a motor, actuating mechanism, atransmission mechanism including a clutch and reversing means, meansoperable by said motor for causing engagement of said clutch andpositioning said reversing means, and manually operable means fordetermining operation of said motoroperated means and said motor.

13. In a calculating machine, a motor, actuating mechanism, a selectingmechanism, a driving means for said actuating mechanism including aclutch, a power operated means for locking said selecting mechanism andfor causing engagement of said clutch seriatim, means for controllingoperation of said motor, and manually operable means for initiatingoperation of said power operated means and said motor controlling means.

14. In a calculating machine, a motor, actuating mechanism, a selectingmechanism, driving means for said actuating mechanism including a clutchand reversing mechanism, power operated means for locking said selectingmechanism, for setting said reversing mechanism, and for subsequentlycausing engagement of said clutch, means for controlling operation ofsaid motor, and manually operable means for initiating operation of saidpower operated means and said motor controlling means.

15. In a calculating machine having a motor,

` a reversible actuator, a transmission mechanism between said motor andsaid actuator and operable to drive said actuator in a selecteddirection,

means driven by-said motor for causing vopera.-

vtion ofvsaid transmission mechanism selectively,

and manually operable means for selectively initiating operation ot saidmotor operated means.

16.' In a motor driven calculating machine, an actuator, clutching andreversing mechanisms between the motor and the actuator, power operatedmeans for causing engagement o! the clutch, a manual controlfor saidmeans, and a second manual control therefor acting to couple saidreversing mechanism to said power opervated means for concurrentoperation thereby.

-1'1. In a motor driven calculating machine, an

actuator, clutching and reversing mechanisms between the motor and theactuator, electromagnetic means for causing engagement of the clutch, amanual control for said means, and a second manual control thereforacting-sto couple said reversing mechanism to said electromagnetic meansfor concurrent operation thereby.

WALTER. E. MATHI.

